Trolley-wheel.



PATENTED AUG. 30, 1904.

F. STRAIL.

TROLLEY WHEEL.

APPLICATION FILED JUNE 1, 1903.

N0 MODEL.

No. 768,959. Patented August 30, 1904.

UNirEn STAT-Es PATENT FFICE.

FREDERICK STRAIL, OF ROCHESTER, NEW YORK, ASSIGNOR OF THREE- FOURTHS TOALFRED GREEN, GEORGE W. HOOPER, AND CHARLES L. HOOPER, OF ROCHESTER, NEWYORK.

TROLLEY-WHEEL.

SPECIFICATION forming part of Letters Patent No. 768,959, dated August30, 1904. Application med June 1,1903. Serial No. 159.678. (N model.)

T 0 107mm it y concern! ing surface 6, upon which or against which Be itknown that I, FREDERICK STRAIL, a the trolley is adapted to bear andthrough 0 citizen ofthe United States,residingatRocheswhich electricalcontact with the car is made ter, in the county of Monroe and State ofNew in the usual manner. In the ordinary trol- 5 York, have invented newand useful Improveley-wheel the walls of the circumferential ments inTrolley-\Vheels, of which the followgrooves are straight or commonlyinclined ing is a specification. outward, and thus it will be readilyseen that 55 My invention relates to improvements in the moment thewheel comes to a curve the trolley-wheels. wire rides up on theinclinedor beveled Walls,

The object of my invention is to provide a and thus the trolley-wheeljumps from the trolley-wheel which is adapted to run on the trolley, andmy invention is particularly deoverhead trolley-wire, whether on top orbesigned to obviate this annoyance and delay 6 neath the trolley-wire,also to be used on the caused thereby. The trolley-Wheel A has theunderground trolley-wire the same way, or on conveXed surface G adjacentthe inner cirr 5 any copper bar or rod carrying a current tocumferential bearing-surface and the inner operate a motor. and is morespecifically conside Walls of said circumferential groove E structed toprevent the same from leaving are concaved at H, which extends from the5 the wire on curves or passing switches, and convexed portion G to theouter edge of the this is accomplished by the specifically-conwheel. Thesaid walls being concaved greater 2o structed trolley without additionalmeans or at the portion 7L, they thus form a more abattachments carriedby the harp, which are rupt shoulder at h. ordinarily used forpreventing the trolley- In trolley systems at curves and switches 7wheel from jumping off the trolley. the trolley-wire is slightly curvedto form the Another object of my invention is to pronecessary curve tocorrespond with that of vide a more simple, cheap, and effective troltherails, and while the trolley-wheel is travley-wheel to accomplish theabove-referred-to eling on the straight portion of the track the resultsthan has heretofore been produced. trolley rests in the central concavedportion In the accompanying drawings, Figure 1 is e in engagement withthe trolley, and when a top plan view of my improved trolley-wheel, thewheel engages the curved portion of the 30 showing it passing a curveand the trolley trolley the said trolley will ride up on the wire shownin dotted lines. Fig. 2 is a verconvexed surface G and into the concavedtical sectional view taken on line as m of Fig. portion H, and thus itwill be seen that a 1. Fig. 3 is a vertical sectional view taken portionof the curved trolley-wire rests in on line 3 y of Fig. 1. said grooveH, as clearly shown in Fig. 2,

3 5 Referring now to the drawings, A repre and the wire or trolleycannot be forced sents my improved trolley-wheel, the outer therefrom onaccount of the wire being portion of which may be of any desiredcurvacurved, and any upward pressure of the wire 5 ture, but ispreferably of that shown*that or downward movement of the trolley-wheelis, with the central or circumferential recess would bring the trolleyinengagement with 4 in its sides for the purpose of making the the abruptportion h, and thus it will be seen wheel lighter and also for thepurpose of sav' that it will be almost impossible to withdraw ing metal.The wheel is provided with the the trolley-wheel from the trolley-wirewhile 9 usual opening C, by means of which it is roon curves. tatablymounted upon a spindle D, and thus Having thus described my invention,what 45 it is allowed to rotate in the usual manner. I claim as new, anddesire to'secure by Letters The outer periphery of said wheel A is pro-Patent, is vided with acircumferential groove E, which 1. A trolleyWheel having a peripheral has at its inner end a concavedtrolley-beargroove adapted to receive the wire, the inner faces of theside walls of said groove being concaved.

A trolley wheel having a peripheral groove adapted. to receive the wire,and having an inner circumferential bearing-surface for said wire andthe inner faces of the side walls of said groove being eoncaved.

3. A trolley wheel having a peripheral groove adapted to receive thewire, said groove having a contracted inner wire-bearing surface, andthe inner faces of the side walls of said. groove being concaved.

4:. A trolley wheel having a peripheral groove adapted to receive thewire, said groove having a contracted inner wire-bearing surface, andthe inner faces of the side walls being concaved from said contractedwire-bearing surface to the outer periphery of said wheel.

5. A trolley wheel having a peripheral groove provided with side wallsbent inward at the outer periphery thereof.

In testimony whereof I have hereunto set my hand in the presence of twosubscribing witnesses.

FREDERICK STRAIL.

\Vitnesses:

J OHN E. MAHER, Crms. R. KING.

